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The Straits Times
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Hazy in Singapore as PSI hits moderate range, Environment News & Top Stories ...The Straits TimesSINGAPORE - The three-hour Pollutant Standards Index (PSI) readings has dipped to 84 at 3pm on Friday (July 10). The air quality level was inching towards the end of moderate range from 63 at 11am and peaked at 92 at 2pm. A reading from 51 to 100 is in ...and more »
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